WO2007097133A1

WO2007097133A1 - Furnace monitoring apparatus and push-out ram having the same

Info

Publication number: WO2007097133A1
Application number: PCT/JP2007/050288
Authority: WO
Inventors: Manabu Sato; Hironobu Inamasu; Kiyoshi Nakata; Keiji Yoshimoto
Original assignee: Kansai Coke And Chemicals Co., Ltd.; Shi Mechanical & Equipment Inc.
Priority date: 2006-02-27
Filing date: 2007-01-12
Publication date: 2007-08-30
Also published as: US20090134005A1; JP2007225266A; EP2003413B1; KR20080100338A; EP2003413A4; CN101389917A; JP4873962B2; EP2003413A2; KR101299497B1; PL2003413T3; US8157968B2; EP2003413A9; CN101389917B; TW200734591A; TWI375005B

Abstract

A furnace monitoring apparatus capable of accurately observing the inside of a furnace at a high temperature comprises a casing (13) having an intake part for cooling air and a discharge part from which the cooling air is discharged after being used for cooling and an imaging device (20) contained in the casing (13) near the discharge part. The imaging device (20) is characterized by comprising an imaging element (16), plate-like thermoelectric cooling elements (18a to 18d) disposed with their heat-absorbing surface sides surrounding the imaging element body, heat conductive blocks (17a to 17d) burying the clearances between the imaging element body and the heat-absorbing surface sides of the thermoelectric cooling elements (18a to 18d), and cooling fins (19a to 19d) formed on the heat-dissipating sides of the thermoelectric cooling elements (18a to 18d) which are formed integrally with each other.

Description

Specification

In-furnace observation device and extrusion ram provided with the same

Technical field

The present invention relates to an in-furnace observation apparatus for observing the inside of a high-temperature furnace and an extrusion ram with an in-furnace observation apparatus suitable for in-furnace observation of a coatus furnace.

Background art

[0002] A coke oven has a structural force in which carbonization chambers and combustion chambers are alternately arranged in the direction of the furnace group. Coal is introduced into the carbonization chamber from a coal charging vehicle that runs in the direction of the furnace group of the cotass furnace. The charged coal is transferred to the carbonizing chamber, and the charged coal is carbonized to produce coatas.

[0003] Many of these types of coke ovens have become obsolete after 30 years from the construction of the furnace, and the refractory bricks that make up the walls of the coking chamber are made of carbon adhering to the damaged parts of the furnace walls. Or, the cycle is repeated when the furnace wall is peeled off due to coal charging and the furnace wall is further damaged, and the factors that hinder the operation, such as deformation of the furnace wall, are becoming apparent.

[0004] In particular, the adhesion state of carbon is slightly different even in daily operations, and observing the state of the furnace wall is an extremely important inspection item in order to obtain a stable operation.

[0005] In this furnace observation, as shown in Fig. 6, when the coatus extrusion is performed, specifically, the red hot coatas 51 which has been removed from the furnace lid and carbonized in the carbonization chamber 50 is replaced with the tip of the ram beam 52. The ram head 53 is pushed out to a guide wheel (not shown) waiting outside the furnace, and the position force of the extruder cab 54 is usually also visually observed by the operator 55.

[0006] In the observation inside the furnace, the temperature inside the furnace is as high as about 1100 ° C, and it is not close to the furnace. The furnace width is as narrow as around 450mm, while the depth is as long as about 15m. There are many restrictions such as poor visibility and limited time of about 2 to 10 minutes depending on the operating rate.

[0007] Under such circumstances, even a skilled operator 55 cannot visually observe the entire furnace. In the figure, 56 indicates carbon adhering to the furnace wall. There is a tendency to adhere to the bottom of each coal charging hole 57.

[0008] Therefore, a method has been proposed in which a water-cooled or air-cooled camera is inserted into the furnace, a wall image photographed by the camera is projected on the screen of a monitor arranged outside the furnace, and the damage state is observed. ! (See, for example, Japanese Utility Model Publication No. 5-27599).

As shown in FIG. 7, this type of in-furnace observation apparatus has a double cylindrical cooling cylinder 62 composed of an outer cooling cylinder 60 and an inner cooling cylinder 61, There is an observation window 63 on the side that also has heat-resistant glass.

[0010] A reflecting mirror 64 is disposed in the cooling cylinder 62 so as to face the observation window 63, and the optical path bent by the reflecting mirror 64 is guided to the zoom lens 65, thereby zooming up. The furnace wall can be photographed by the CCD camera 66.

Note that cooling water or cooling air F is introduced into the passage between the outer cooling cylinder 60 and the inner cooling cylinder 61.

[0012] In addition, a plurality of thermoelectric cooling elements 67 that generate the Peltier effect are disposed on the inner wall of the cooling cylinder 62, so that the measuring device such as the CCD camera 66 is protected from the high-temperature cover. .

[0013] According to the in-furnace observation apparatus described above, it is possible to observe even the inner part of the furnace without being an expert. However, in this in-furnace observation device, the image of the image displayed on the monitor screen is distorted or out of focus just by applying vibration, due to the configuration of using the reflector 64 etc. to observe the furnace wall indirectly. In some cases, the observation inside the furnace cannot be performed accurately.

[0014] In addition, since it is necessary to take a long optical path from the reflecting mirror 64 to the zoom lens 65, there is a problem when the in-furnace observation apparatus is enlarged.

[0015] The reason for indirectly observing the inside of the furnace using the reflecting mirror 64 as described above is that if the CCD camera 66 is arranged in the vicinity of the observation window 63 in a double cylinder shape, the CCD camera 66 This is because they break down when exposed to high temperatures.

[0016] In addition, since the cooling by the thermoelectric cooling element 67 is indirect cooling via air, the cooling rate is slow and the temperature control is difficult. Since the cooling force is also cooling in the sealed chamber, the air is not agitated, and a uniform cooling effect and the required temperature drop cannot be obtained. It is impossible to increase the size of the thermoelectric cooling element 67 because the space in the cooling cylinder 62 is limited even if the capacity of the thermoelectric cooling element 67 is increased. [0017] The present invention has been made in consideration of the problems in the conventional in-furnace observation apparatus as described above, and the first object is to observe the inside of the high-temperature furnace with high accuracy. The second object is to provide an extrusion ram with an in-furnace observation device that allows the in-furnace observation device to be installed on the ram beam by achieving compactness. Disclosure of the invention

[0018] The present invention is housed in a vicinity of the casing having a cooling air introduction section and a discharge section that is discharged after the cooling air is used for cooling, and in the vicinity of the discharge section in the casing. The imaging device includes an imaging element, a plate-shaped thermoelectric cooling element disposed with the heat absorption surface surrounding the periphery of the imaging element body, and the imaging element body and the thermoelectric cooling element. This is an in-furnace observation apparatus in which a heat conductor that fills the gap between the heat absorption surface and a cooling fin formed on the heat radiation surface of the thermoelectric cooling element is integrated.

[0019] In the present invention, if the imaging device is housed in a casing in a state of being housed in a cylindrical heat insulating portion, cooling for flowing cooling air between the outer wall of the heat insulating portion and the inner wall of the housing. A passage is formed, and heat entering the housing through the cooling passage can be absorbed and discharged from the discharge portion.

[0020] It is preferable that a heat insulating material is attached to the inner wall of the housing. As a result, heat entering the cooling passage from the housing can be suppressed.

[0021] In addition, an observation window is provided at a position facing the lens of the image sensor on the front surface of the housing, and the observation window is formed of a laminated body of heat-resistant glass, an infrared absorption filter, and an infrared reflection filter. preferable.

[0022] Further, since the outer peripheral portion of the cooling fin is surrounded by the cylindrical heat insulating portion, the gap between the cooling fins forms a second cooling passage for flowing cooling air. With the cooling air passed through the cooling passage to suppress the intrusion of heat from the outside of the housing, the cooling air can be passed through the second cooling passage to increase the cooling efficiency of the cooling fins. Thereby, the thermoelectric cooling element can be stably operated.

[0023] Further, a flow for changing the flow direction of the cooling air that has passed through the second cooling passage toward the observation window side at the downstream end of the flow of the cooling air in the cylindrical heat insulating portion. A direction change part can be formed. This redirected cooling air enters the observation window. It acts to blow off the adhering dust.

[0024] The present invention is an extrusion ram with an in-furnace observation device in which the in-furnace observation device having the above-described configuration is installed in a ram beam of an extrusion ram disposed in a coke oven.

[0025] In the extrusion ram with an in-furnace observation device, a hose that supplies cooling air to the in-furnace observation device, and an image sensor and a thermoelectric cooling element are supplied into heat-insulated piping laid on the ram beam. In addition, a cable for outputting a photographed image and a cable for transmitting a control signal for controlling the temperature of the thermoelectric cooling element can be accommodated.

[0026] According to the in-furnace observation apparatus of the present invention described above, the inside of the high-temperature furnace can be observed with high accuracy.

[0027] Further, according to the extrusion ram with the in-furnace observation device of the present invention described above, since the compactness can be achieved, the in-furnace observation device can be installed on the ram beam, and at the time of daily coatus extrusion work, It becomes possible to observe the carbonization chamber with high accuracy.

Brief Description of Drawings

FIG. 1 is a side view showing a state where an in-furnace observation apparatus according to the present invention is installed in an extrusion ram.

FIG. 2 is an enlarged longitudinal sectional view of the in-furnace observation apparatus shown in FIG.

[FIG. 3] (a) is a perspective view having a partially cutaway showing the configuration of a camera unit incorporated in the in-furnace observation apparatus, and (b) is a front view thereof.

FIG. 4 is an enlarged view of the main part showing the filter part of the in-furnace observation apparatus shown in FIG.

FIG. 5 is a front view showing the configuration of the front side of the in-furnace observation apparatus.

FIG. 6 is a side view for explaining a conventional in-furnace observation method performed during the coatus extrusion operation.

FIG. 7 is a cross-sectional view showing an internal configuration of a conventional in-furnace observation apparatus.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.

[0030] In FIG. 1, the Cortus extruder includes an extrusion ram 3 having a ram head 1 and a ram beam 2 for moving the ram head 1 back and forth in the horizontal direction. Will be pushed out of the furnace by the ram head 1! A support stand 4 is erected on the ram beam 2 and close to the ram head 1, and an in-furnace observation device 5 is installed on the support stand 4.

In the figure, A indicates the direction of extrusion of the extrusion ram 3. B is a furnace observation device

5 indicates the viewing direction, and Θa indicates the angle of view of a CCD camera (described later) mounted in the in-furnace observation device 5.

[0033] The signal system of the in-furnace observation device 5 is a signal unrolled from one side of the drum (in the drum shaft) of the scraping device 6 (in the drum shaft) via a Z power cable 7 and a controller in the extruder operating room not shown The image inside the furnace can be observed in the cab. If necessary, the video can be recorded on a recording device.

[0034] Specifically, the signal system includes a power line for supplying power to the CCD camera and the thermoelectric cooling element (Peltier element), an output line for outputting an image signal photographed by the CCD camera, and a thermoelectric cooling element. A control signal line for controlling the temperature is included.

[0035] The cooling system of the in-furnace observation apparatus 5 is connected to a tank 9 for storing cooling air via a hose 8 unwound from the other side of the drum of the same scraping apparatus 6, and this tank Connected to 9 is a compressor 10 for maintaining the cooling air at a predetermined pressure (pressure that can supply pressure lost due to pressure loss of piping, for example, 0.4 to 0.7 MPa). The above-described scraping device 6, tank 9 and compressor 10 are mounted on an extruder.

[0036] 11 is an image conversion device for a CCD camera (described later), a converter / temperature control device including a power supply device for a thermoelectric cooling element (described later), and a ram beam that is not affected by the heat in the furnace. 2 Arranged at the rear end.

[0037] Further, the signal Z power cable 7 and the hose 8 pass from the rear end of the ram beam 2 through the heat insulating pipe 12 laid in the ram beam 2, and to the in-furnace observation device 5 installed on the front side of the ram beam 2. It is connected. The signal Z power cable 7 uses a heat-resistant cable.

FIG. 2 is an enlarged view of the in-furnace observation apparatus 5.

[0039] In the figure, the in-furnace observation apparatus 5 has a heat-insulated box-shaped casing 13, and a CCD camera, a thermoelectric cooling element, a thermocouple for temperature management, etc. are provided in the casing 13 with the minimum necessary. Look at the device A camera with an electronic cooling device is housed as a combined imaging device.

[0040] Specifically, the housing 13 is disposed on the front side of a rectangular tube portion 13a, a rear plate 13b that closes a rear end surface of the rectangular tube portion 13a (behind with respect to the observation direction B). It consists of a front plate 13c. A ceramic heat insulating material 14 is attached to each of the inner surface of the rectangular tube portion 13a and the inner surface of the rear plate 13b.

[0041] The rear plate 13b is provided with a connecting portion 15 for connecting the pipe 12, and the cooling air ca is introduced into the housing 13 through the pipe 12. Further, an image signal is output through the photographing cable 7a accommodated in the signal Z power cable 7, and a control signal for controlling the temperature of the thermoelectric cooling element is transmitted through the control cable 7b. The pipe 12 in the connecting portion 15 functions as an introduction portion for the cooling air ca.

FIG. 3 (a) shows the configuration of the camera with an electronic cooling device 20 in a perspective view having a part of the cutout, and FIG. 3 (b) shows a front view thereof.

In FIG. 3 (a), a camera with an electronic cooling device 20 includes a CCD camera 16 as an image sensor, a thermal conductor 17 (FIG. 2) disposed around the CCD camera 16, and a thermal conductor. Thermoelectric cooling element group 18 (Fig. 2) arranged outside 17 and cooling fin group 19 (Fig. 2) arranged outside these thermoelectric cooling element group 18 are integrated. ing.

As the CCD camera 16, for example, a small color CCD camera equipped with a 1Z2 type CCD having 400,000 effective pixels can be used. The effective number of pixels of the CCD camera 16 can be observed in the furnace if it is about 400,000 pixels. Of course, a CCD camera having a larger number of pixels may be used. In addition, the lens equipped with a wide-angle lens is used to photograph the left and right wall surfaces in the furnace. When close-up of the furnace wall surface is required, a zoom lens is installed. It is possible to shoot.

[0045] Four aluminum heat conduction blocks 17a to 17d constituting the heat conductor 17 are arranged so as to surround the body of the CCD camera 16; Block 17d has been removed for convenience of explanation of the internal configuration.

[0046] Thermoelectric cooling elements 18a to 18d (parts of 18c and 18d appear in the figure) are arranged in close contact with the outer surfaces of the heat conduction blocks 17a to 17d, respectively. Cover the locks 17a to 17d in a bowl shape.

In FIG. 3 (b), each of the thermoelectric cooling elements 18a to 18d is configured by stacking two plate-like thermoelectric cooling elements, and the thermoelectric cooling element 18a will be described as a representative. 18e faces the CCD camera 16 side and the heat radiating surface 18f faces the cooling fin 19a side.

With this configuration, the surface temperature of the main body of the CCD camera 16 is controlled by the thermoelectric cooling element group 18 through the heat conduction blocks 17a to 17d.

[0049] The CCD power camera 16 surrounded by the heat conduction blocks 17a to 17d and further surrounded by the thermoelectric cooling element group 18 is housed in a rectangular tube case 19e that also serves as a heat conduction member. Cooling fins 19a to 19d constituting the cooling fin group 19 are formed on each surface of the outer wall of the case 19e so that the heat generated by the thermoelectric cooling element group 18 is dissipated.

[0050] It should be noted that the small gaps formed between the inner wall of the case 19e and the four corners of the heat conduction blocks 17a to 17d are closed by the heat insulating material 30, and the cooling air ca does not flow except for the cooling fins 19a to 19d. It is like this.

[0051] A camera with an electronic cooling device unitized in this way (hereinafter abbreviated as a camera unit)

20 is arranged on the front side inside the housing 13.

[0052] Returning to FIG.

[0053] On the front side of the inside of the housing 13, there is a square tubular partition member (cylindrical heat insulating portion) 21 that is slightly smaller in a state where each inner wall force of the rectangular tube portion 13a of the housing 13 has a predetermined gap. The cutting member 21 is composed of a stainless steel thin plate and a ceramic force.

[0054] The gap serves as a cooling passage Pa for allowing a part of the cooling air ca to flow along the inner wall of the casing. The partition member 21 and the inner wall of the casing are partially connected by a plurality of rod-shaped members (not shown) arranged along the longitudinal direction of the casing.

The camera unit 20 is housed in the partition member 21.

[0056] The fin outer periphery of cooling fin group 19 and the inner wall of partition member 21 are connected in a state in which camera unit 20 is housed, and cooling air ca is also inserted into the gaps between the cooling fins of cooling fin group 19.

2 It begins to flow. The clearance between these cooling fins constitutes the second cooling passage Pb (see Fig. 3 (a)). However, each cooling fin of the cooling fin group 19 is arranged toward the cylinder axis direction of the partition member 21.

[0058] Further, the front end portion (flow direction changing portion) 21a of the partition member 21 is bent by a predetermined length in a direction orthogonal to the cylinder axis direction of the housing 13 so as to be L-shaped inward. Its tip is formed in a taper that opens at an angle of 0 b (see Fig. 4) both vertically and horizontally. This angle Θ b is set slightly wider than the angle of view Θ a of the lens 16 a of the CCD camera 16.

A plate-like filter support member 22 is disposed at the front end of the camera unit 20 in parallel with the front end 21a, and a hole formed in the center of the filter support member 22 is described later. A group of filters is arranged.

In the figure, reference numeral 30 denotes a heat insulating material covering the periphery of the main body of the CCD camera 16 and insulates other than the heat dissipation path leading to the cooling fin group 19.

FIG. 4 is an enlarged view of the observation window and the surrounding structure.

[0062] In the figure, reference numeral 23 denotes a heat-resistant glass in which a multilayer filter in which an infrared reflection filter is superimposed on the inside of the heat-resistant glass is further laminated.

[0063] An observation window is configured by opening a gap S from the heat-resistant glass 23 and arranging (24 to 26) an infrared absorption filter 'infrared reflection filter' and heat-resistant glass in combination (24-26) through a spacer. . The lens 16a of the CCD camera 16 faces the heat-resistant glass 26.

[0064] Further, since the front end 21a is bent in an L shape, the cooling air ca is

2 After passing through the second cooling passage Pb, its direction is changed by 90 °, flows through the gap D between the filter support member 22 and the front end 21a, and joins at the center of the heat-resistant glass 23 and faces outward. And discharged from the central opening 27 to the outside of the housing 13.

[0065] Further, the cooling air ca flowing upward in the gap between the filter support member 22 and the front end portion 21a flows in a branched manner on both the front and rear sides of the heat-resistant glass 23 and flows downward.

Three

To join. As a result, the heat-resistant glass 23 can be efficiently cooled on both sides.

Four

At the same time, dust adhering to the outer surface of the heat-resistant glass 23 is cooled by the cooling air ca and ca.

3 4 Now you can blow away.

[0066] Note that the cooling air ca flowing through the cooling passage Pa is a slit formed in the front plate 13c. The force of the aperture 13d (described later) is also released to the outside of the housing 13.

FIG. 5 shows the arrangement of slit-shaped openings 13d formed in the front plate 13c.

[0068] In the figure, the slit-shaped openings 13d are arranged in a state in which rectangular openings are arranged in a row at a total of four positions on the top and bottom and the left and right of the front plate 13c. Each slit-shaped opening 13d is provided with a cover 28 having a band plate-like member force having a size slightly larger than the size.

[0069] The cover 28 can be moved in a direction (arrow C direction) perpendicular to the longitudinal direction of the slit-shaped opening 13d by loosening the screw 29, whereby cooling air blown out from the slit-shaped opening 13d. The flow rate of ca can be adjusted. This makes it possible to adjust the balance according to the situation even when the balance of the cooling air volume changes due to long-term use. In addition, the measurement of the amount of cooling air ca is measured before observation and set to a predetermined opening.

[0070] The central opening 27 and the slit-shaped opening 13d shown in FIG. 4 constitute a discharge portion that is discharged after the cooling air ca is used for cooling.

By the way, when the cooling air ca is supplied to the in-furnace observation apparatus 5 installed on the front end side of the ram beam 2, even if the hose supplying the cooling air ca is stored in the heat insulating pipe 12, the furnace When the temperature reaches the internal observation device 5, the temperature of the cooling air ca supplied increases to about 100 ° C.

When the cooling air ca that has been heated in this way is introduced into the housing 13, the surface temperature of the CCD camera 16 is raised. Since the operating temperature range of the CCD camera 16 is normally 0 to + 40 ° C, the temperature of the cooling air ca that has been raised to 100 ° C must be lowered by about 60 ° C.

[0073] Some conventional observation apparatuses in the furnace are provided with a plurality of thermoelectric cooling elements in the observation apparatus as a cooling means, but this type of observation apparatus is simply attached to the inner wall of the apparatus, It is impossible to lower the temperature to around 60 ° C because the space inside the device where the CCD camera is located is cooled and the CCD camera is indirectly cooled by the cooled atmosphere.

On the other hand, in the in-furnace observation apparatus 5 of the present invention, the heat absorption side of the thermoelectric cooling element group 18 is brought into close contact with the CCD camera 16 via the heat conductor 17, and the heat dissipation of the thermoelectric cooling element group 18 is performed. On the side The thermoelectric cooling element group 18 is configured to be cooled and operated with high efficiency by attaching and integrating the cooling fin group 19.

[0075] The thermoelectric cooling elements 18a to 18d constituting the thermoelectric cooling element group 18 are made of electronic components that function as small heat pumps and are capable of precise local temperature adjustment. The structure consists of two ceramic elements and a pair of n-type and rho-type semiconductor elements arranged between the two ceramic plates and energized through the lead wire. Absorbs heat (cools), and the opposite surface dissipates (heats).

In this embodiment, two thermoelectric cooling elements are stacked and used in order to enhance the cooling effect. Further, the outer dimensions (L XWX H) of the thermoelectric cooling elements 18a to 18a are 40 X 40 X 7mm, and the maximum temperature difference between the heat absorption surface and the heat dissipation surface is 60 ° C or more.

[0077] The cooling operation will be specifically described. The surface temperature of the CCD camera 16 is monitored with a thermocouple, and when it exceeds 40 ° C, the thermoelectric cooling element group 18 is turned on. When the thermoelectric cooling element group 18 is turned on, the heat radiation side temperature is almost the same as the temperature of the cooling air ca, which is always maintained at a predetermined temperature. 16 can be cooled. As a result, the surface temperature of the CCD camera 16 can be kept below 40 ° C, and the CCD camera 16 can be operated stably.

Further, in FIG. 2, the heat that enters the in-furnace observation apparatus 5 of the casing 13 outside the casing 13 is first blocked by the heat insulating material 14 attached to the inner wall of the casing 13, and part of the heat is Even if it passes through the heat insulating material 14, most of it is taken away by the cooling air ca flowing in the cooling passage Pa. Therefore, there is little influence on the cooling air ca passing through the cooling fin group 19 disposed in the second cooling passage Pb.

2

Next, the operation of the in-furnace observation apparatus 5 having the above configuration will be described.

[0080] When the furnace lid is removed in the extrusion operation of extruding the red hot coatas 51 that has been carbonized in the carbonization chamber, the extrusion ram 3 shown in Fig. 1 is inserted into the carbonization chamber, and the ram head 1 at the tip of the ram beam 2 is inserted. Extrudes red hot coatas.

[0081] When the extrusion ram 3 moves in the carbonization chamber, the in-furnace observation device 5 is installed in a direction opposite to the insertion direction of the extrusion ram 3, and the furnace wall of the carbonization chamber is placed on the extruder side force guide wheel side. Shoot for

The image signal is related to the position signal information of the extrusion ram 3 and output to the controller described above. To help.

[0082] Cooling air ca is constantly supplied to the in-furnace observation device 5 through the pipe 12, and the cooling air ca supplied to the in-furnace observation device 5 is connected to the cooling passage Pa as shown in FIG. It separates from the second cooling passage Pb and flows in the housing 13.

[0083] The cooling air ca flowing in the cooling passage Pa absorbs heat that enters the casing 13 through the heat insulating material 14 attached to the inner wall of the casing 13, and is used for heat exchange. The cooling air ca thus discharged is discharged to the outside of the housing 13 through a slit-shaped opening 13d provided in the front plate 13c.

[0084] The CCD camera 16 in the camera unit 20 includes heat conduction blocks 17a to 17 arranged around the camera.

Since the thermoelectric cooling element 18a to 18d comes into contact with the heat absorption side of the thermoelectric cooling element 18d through 17d, the thermoelectric cooling element

18a-18d is cooled by temperature control.

[0085] Further, heat generated by the thermoelectric cooling elements 18a to 18d is transmitted to the cooling fins 19a to 19d, and the cooling fins 19a to 19d are arranged, and the cooling air ca is provided in the second cooling passage Pb.

2 Since it always flows, the heat generated by the thermoelectric cooling elements 18a to 18d is dissipated by the cooling air ca.

[0086] The cooling air ca passed through the second cooling passage Pb and used for heat exchange is further processed.

2

By flowing through the gap D (see Fig. 4) between the front end of the cutting member 21 and the filter support member 22, the direction is changed to a direction where it concentrates on the heat-resistant glass 23, and dust adheres to the surface of the heat-resistant glass 23. To prevent.

[0087] Further, a part of the cooling air ca that has passed through the second cooling passage Pb is composed of the heat-resistant glass 23 and the infrared ray.

2

It also flows into the gap provided between the wire absorption filter 24 (see Fig. 4), and as a result, the heat-resistant glass 23 is cooled efficiently.

[0088] Further, the in-furnace observation device 5 may be operated during the coatus extrusion by the extrusion ram 3 (one direction only), or when the coatus extrusion and the return of the extrusion ram 3 (both directions). You can make it work.

Industrial applicability

The in-furnace observation apparatus of the present invention can be suitably used for observing the inside of a coke oven, converter, firing furnace, incineration boiler, power generation boiler, or other high-temperature furnace.

Claims

The scope of the claims

[1] A housing having a cooling air introduction portion and a discharge portion that is discharged after the cooling air is provided for cooling, and an imaging device that is housed near the discharge portion in the housing The imaging device has

An image sensor;

A plate-like thermoelectric cooling element disposed with the heat absorption surface side surrounding the periphery of the image sensor body;

A furnace characterized by integrating a heat conductor that fills a gap between the imaging element body and the heat absorption surface side of the thermoelectric cooling element, and a cooling fin formed on the heat radiation surface side of the thermoelectric cooling element. Internal observation device.

[2] The imaging device is housed in the housing in a state of being housed in a cylindrical heat insulating portion, and a cooling passage is formed between the outer wall of the heat insulating portion and the inner wall of the housing to flow cooling air. The in-furnace observation apparatus according to claim 1.

[3] The in-furnace observation device according to claim 2, wherein a heat insulating material is adhered to the inner wall of the casing.

[4] The observation window is provided at a position facing the lens of the imaging device on the front surface of the housing, and the observation window force is configured by a laminate of heat-resistant glass, infrared absorption filter, and infrared reflection filter. 1. In-furnace observation apparatus.

[5] The furnace interior view according to claim 2, wherein an outer peripheral portion of the cooling fin is surrounded by the cylindrical heat insulating portion, and a gap between the cooling fins constitutes a second cooling passage for flowing cooling air. Observation device.

[6] Flow direction in which the flow direction of the cooling air that has passed through the second cooling passage is changed toward the observation window side at the downstream end in the flow direction of the cooling air in the cylindrical heat insulating portion. 6. The in-furnace observation apparatus according to claim 5, wherein a changing portion is formed.

[7] An extrusion ram with an in-furnace observation device, wherein the in-furnace observation device according to any one of claims 1 to 6 is installed in a ram beam of an extrusion ram disposed in a coke oven.

[8] A heat hose for supplying cooling air to the in-furnace observation device, power supply to the imaging element and thermoelectric cooling element, and output of a captured image in a heat insulating pipe laid on the ram beam. Control for temperature control of cable and thermoelectric cooling element The extrusion ram with an in-furnace observation device according to claim 7, wherein a cable for transmitting a control signal is accommodated.

9. The extrusion ram with in-furnace observation device according to claim 8, wherein a tank for storing the cooling air and a compressor for maintaining the cooling air in the tank at a predetermined pressure are mounted on the extrusion ram. .